A sulfide ore composed of galena, chalcopyrite, sphalerite, pyrite and silicate minerals is subjected to selective flotation. Draw a flotation circuit based on this information. Explain what parts of this selective flotation circuit the flotation reagents will be used along with the purpose of additions. Galena and chalcopyrite are liberated by 90% from other minerals in the ore below 0.2 m. On the other hand, 100% liberation of other minerals from each other occurs below 0.053 mm.

b) Calculate H+ and OH- ions concentration for your a circuit of your choice.